NYC Announces Largest Expansion of 'Sammy's Law' with 200 New 15 MPH School Slow Zones and 77 Open Streets

For city officials and grieving families, dropping the speed limit to 15 miles per hour outside New York City schools is a mathematical certainty that will save children's lives. For daily commuters and outer-borough drivers, the sudden proliferation of hundreds of new micro-speed zones represents a frustrating labyrinth of enforcement traps that will grind neighborhood traffic to a halt. The immediate reality for motorists is that the daily drive has changed: the New York City Department of Transportation has already activated more than 200 new 15 mph School Slow Zones this month, with roughly 800 locations expected to receive the lower limits by the end of 2026.[3][4]

The sweeping reduction represents the largest implementation to date of Sammy's Law, a 2024 measure that granted the city the authority to lower speed limits below the state-mandated 25 mph default. The law is named for Sammy Cohen Eckstein, a 12-year-old boy who was fatally struck by a speeding driver in Brooklyn in 2013. Under the administration's current plan, the city intends to establish 15 mph limits at every eligible public, private, parochial, and charter K-12 school location across the five boroughs by the end of Mayor Zohran Mamdani's first term.[3][4]

"Every student deserves to feel safe when they make their way to school, and every parent deserves the same peace of mind," Mayor Mamdani said during the September 9 announcement at Flushing International High School in Queens. The administration noted that the 2,300 eligible school locations house approximately 3,200 individual schools, as multiple educational institutions frequently share a single campus.[4]

The physics of the speed reduction form the core of the city's safety argument. According to the Department of Transportation, a pedestrian struck by a vehicle traveling at 25 mph is more than three times as likely to suffer a serious injury compared to someone struck at 15 mph. DOT Commissioner Mike Flynn emphasized that the initiative is rooted in the city's Vision Zero strategy, stating that "even a small speed reduction can mean the difference between life and death in a crash."[1][4]

The rollout involves converting roughly 700 existing 20 mph School Slow Zones to the new 15 mph standard, while establishing approximately 100 entirely new 15 mph zones at schools where the current limit remains 25 mph. Before any new speed limit is implemented, the transportation agency is required to provide a mandatory 60-day notice and comment opportunity to the local community board.[3]

Beyond simply changing the numbers on the signs, the city is deploying physical infrastructure to alter driver behavior. The Department of Transportation is implementing safety upgrades adjacent to more than 300 schools during 2026. Depending on the specific location, these projects include redesigned intersections, expanded pedestrian spaces, safer crossings, and speed humps intended to physically force motorists to decelerate.[3][4]

In Tribeca, the city is taking the concept of traffic calming a step further by installing its first-ever gated Open Street outside a school. A physical swing-arm gate will be placed on Clarkson Street between Hudson and Varick streets, allowing the block to be temporarily closed to all vehicle traffic. The redesign, completed in partnership with City-As-School High School, M.S. 721, and the advocacy group Open Plans, will provide students with outdoor areas for recess and learning while creating a calmer environment for morning drop-offs and afternoon pickups.[1][4]

The Clarkson Street project is one of 77 school Open Streets launching for the 2026-2027 academic year. "As a parent of two NYC public school students, I understand the importance of Open Streets as an opportunity to provide safe, open-air environments for children to learn and play," Commissioner Flynn said, noting that the program also provides parents and guardians with a more social pickup experience.[4]

For drivers navigating the city, the practical impact is a significant reduction in streets where the familiar 25 mph limit applies. Motorists accustomed to the standard citywide limit—or even the 20 mph limits previously posted around many schools—will need to pay increasingly close attention to School Slow Zone signs to avoid automated camera tickets. The changes also affect commuters traveling into the city from the surrounding region, requiring them to adjust their driving habits as they enter the five boroughs.[3][5]

Advocates who spent years lobbying for Sammy's Law view the current expansion as a long-overdue victory. "Expanding 15 MPH school slow zones to hundreds of schools this year is exactly the kind of bold, life-saving action our streets need," said Manhattan Borough President Brad Hoylman-Sigal, who praised the administration for advancing street redesigns in front of hundreds of schools in a single year.[1][4]

While the city pushes forward with the 15 mph zones, certain schools will not qualify for the reduced limits. Facilities situated on private roads or along specific multi-lane arterial roadways are exempted under the provisions of Sammy's Law. For the remaining majority of the city's educational institutions, the transition to 15 mph will continue steadily through the end of the decade.[3]